P. JAGADEESWARI; K. RAMANATHAN; K. MANIMEKALAI. Square Difference Labeling for Pyramid Graph and its Related Graphs. International Journal of Mathematics And its Applications, [S. l.], v. 6, n. 1 (Special Issue), p. 91–96, 2018. Disponível em: https://ijmaa.in/index.php/ijmaa/article/view/1400. Acesso em: 3 jul. 2024.